Gaseous fuel burner



June 12, 1934.

U. G. ELMORE GASEOUS FUEL BURNER Filed Sept. 16, 1932 2/ I I l 1 HQ i I m w UZzlss 61f Z7770 r6,

A TTORNEY.

Patented June 12, 1934 UNITD STATES PATENT ()FFICE 1 Claim.

This invention relates to improvements in gaseous fuel burners especially useful for boiler and other furnaces, and the primary object of the invention is to provide a burner of this kind which will require a minimum of attention when once properly adjusted, which will create an intense heat, and which may be readily installed for use.

A further object of the present invention is to provide a burner of the above kind which will not overheat, and which will be economical in fuel consumption and inexpensive to manufacture.

The invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing, and claimed.

In the drawing:

Figure 1 is a central longitudinal section of a burner embodying the present invention.

Figure 2 is a section on line 22 of Figure 1; and

Figure 3 is a section on line 3-3 of Figure 1. Referring in detail to the drawing, the present invention includes a draft or accumulator chamber 5 into one side of which opens a gas supply pipe 6 having a control valve '7 and extending from a suitable-source of supply of combustible gas under relatively low pressure. Provided at the inner end of chamber 5 is an inlet 8 having a discharge nozzle 9 and into which opens a supply pipe 10 for a fluid under relatively high pressure, such as compressed air or steam. The chamber 5 has an outlet 11 at its outer end provided with a discharge nozzle 12 opening into the inner end of a mixing chamber 13. The mixing chamber 13 has an outlet 14 at its outer end provided with a discharge nozzle 15 having a tubular outlet portion 16 which opens into the intermediate portion of a combustion chamber 17 within which is supported a cone 18 by means of a cross bar 19. The cone 18 is arranged outward- 1y of and co-axial with the tubular outlet portion 16 with its apex adjacent the outer end of the latter so as to spread the mixture of gas and air or steam issuing from portion 16 into a tubular stream as it issues from chamber 1'7 and burns with air entering openings 20 in the inner end of chamber 1'7.

Provided about chamber 17 is a jacket 21 into which opens a pipe 22 leading from a suitable source of steam or air under high pressure and provided with a control valve 23. The supply pipe 10 leads from jacket 21 and has a control valve 24. In operation, gas enters chamber 5 from pipe 555 6 under relatively low pressure, being suitably regulated by valve 7. Steam or air under relatively high pressure enters jacket 21 of chamber 17 from pipe 22 and flows from jacket 21 into chamber 5 by way of pipe 10 and nozzle 9, being suitably regulated by valves 23 and 24. The gas and steam or air expand and co-mingle in chamber 5 to form an atomized mixture and pass under a constant pressure into chamber 13 where they expand again and become thoroughly mixed to escape under a constant pressure into chamber 17. As the fuel mixture enters chamber 1'7 through nozzle 15 and tubular portion 16, it is spread into a tubular stream by cone 18 into contact with the jacketed wall of chamber 17, mixing with the air entering the latter chamber through openings 20. The steam or air flowing through jacket 21 prevents overheating of chamber 17 wherein the fuel is ignited and from which the flame issues. Also, the fuel mixture accumulates within and issues from the chambers 5 and 13 under a constant or uniform high pressure, the mixture being uniform at all times to provide an even and intense flame due to thorough mixing of the gas and air or steam in such chambers and expansion of the mixture as it passes through the nozzles from one chamber to the other. As will be apparent, the burner is simple and durable in construction, easy and economical to manufacture, install and operate, and efficient in use.

Minor changes may be made in the construction illustrated and described without departing from the spirit of the invention as claimed.

What I claim as new is:

A gaseous fuel burner comprising a bulb-like accumulator chamber provided at its inner larger end with an air or steam supply chamber having a restricted discharge nozzle opening into said accumulator chamber axially of the latter, a supply pipe extending from a source of air or steam under relatively high pressure and opening into said air or steam supply chamber, a supply pipe extending from a source of combustible gas under relatively low pressure and opening into said accumulator chamber at one side of the latter so that the gas and air or steam meet in said accumulator chamber in conflicting jets substantially at right angles to each other, said accumulator chamber having an outlet at its smaller outer end provided with a restricted discharge nozzle, a tapered mixing chamber, said lastnamed nozzle opening into the inner larger end of said mixing chamber axially of the latter, said mixing chamber having an axial outlet at its smaller outer end provided with a restricted disof gas and air or steam into a tubular stream before it issues from the outer end of the combustion chamber, said combustion chamber having openings for the admission of atmospheric air at its inner end and about said tubular oulet portion.

ULISS G. ELMORE. 

